Texas State University is a public research university with its main campus in San Marcos, Texas and another campus in Round Rock. Since its establishment in 1899, the university has grown to be one of the largest universities in the United States. Texas State University reached a record enrollment of 40,678 students in the 2024 fall semester, continuing a …Texas State University is a public research university with its main campus in San Marcos, Texas and another campus in Round Rock. Since its establishment in 1899, the university has grown to be one of the largest universities in the United States. Texas State University reached a record enrollment of 40,678 students in the 2024 fall semester, continuing a trend of enrollment growth over several years.